<template>
    <el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose"
        :collapse="isCollapse"
        background-color="#545c64"
        text-color="#fff"
        active-text-color="#ffd04b"
        >

       <h3>{{ isCollapse ? '后台' :'通用化后台管理' }}</h3>
        <el-menu-item @click="clickMenu(item)"  v-for="item in noChildren" :key="item.name" :index="item.name" >
            <!--通过name的不会重复进行遍历-->
            <i :class="`el-icon-${item.icon}`"></i>
            <!--使用反引号才能使用模板字符串-->
            <span slot="title">{{ item.label }}</span>
        </el-menu-item>
        <el-submenu v-for="item in  hasChildren" :key="item.label" :index="item.label">
            <template slot="title">
                <i :class="`el-icon-${item.icon}`"></i>
                <span slot="title">{{ item.label }}</span>
            </template>
            <el-menu-item-group v-for="subItem in item.children" :key="subItem.path">
                <el-menu-item @click="clickMenu(subItem)" :index="subItem.path">{{ subItem.label }}</el-menu-item>
            </el-menu-item-group>
        </el-submenu>
    </el-menu>
</template>

<style lang="less" scope>
.el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
}
.el-menu{
    height: 100vh;
    border-right: none;
    h3{
        color: #fff;
        text-align: center;
        line-height: 48px;
        font-size: 16px;
        font-weight: 400px;
    }
}
</style>

<script>
import { computed } from 'vue'
import Cookie from 'js-cookie'
export default {
    data() {
        return {
            //isCollapse: false,控制菜单栏是否展开
            /*
            menuData: [

                {
                    path: '/',
                    name: 'home',
                    label: '首页',
                    icon: 's-home',
                    url: 'Home/Home'
                },
                {
                    path: '/mail',
                    name: 'mail',
                    label: '商品管理',
                    icon: 'video-play',
                    url: 'MallManage/MallManage'
                },
                {
                    path: '/user',
                    name: 'user',
                    label: '用户管理',
                    icon: 'user',
                    url: 'UserManage/UserManage'
                },
                {
                    label: '其他',
                    icon: 'location',
                    children: [
                        {
                            path: '/page1',
                            name: 'page1',
                            label: '页面1',
                            icon: 'setting',
                            url: 'Other/PageOne'
                        },
                        {
                            path: '/page2',
                            name: 'page2',
                            label: '页面2',
                            icon: 'setting',
                            url: 'Other/PageTwo'
                        }
                    ]
                }
            ]
            */

        };
    },
    methods: {
        handleOpen(key, keyPath) {
            //console.log(key, keyPath);
        },
        handleClose(key, keyPath) {
            //console.log(key, keyPath);
        },
        //点击菜单
        clickMenu(item){
           // console.log(item);
              //当页面的路由与跳转的路由不一致才允许跳转
            if(this.$route.path !==item.path &&  !(this.$route.path === '/home' && (item.path ==='/'))){
            this.$router.push(item.path)
            }

            this.$store.commit('selectMenu',item)
              

        }
    },
    computed:{


        //没有子菜单
        noChildren(){
           return this.menuData.filter(item => !item.children)
           
        },
        //有子菜单的
        hasChildren(){
            return this.menuData.filter(item => item.children)

        },
        menuData(){
            //判断当前数据，如果缓存中没有，就从当前的store中获取
            if(Cookie.get('menu') !== "undefined"){
                return JSON.parse(Cookie.get('menu')) 
            }else{
                return this.$store.state.tab.menu;
            }
    
            //return this.$store.state.tab.menu|| JSON.parse(Cookie.get('menu')) 
           //console.log(JSON.parse(Cookie.set('menu'))) 
            //JSON.parse(Cookie.get('menu')) || 

        },
        isCollapse(){
            return this.$store.state.tab.isCollapse
        }

    }
}
</script>
